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Dynamically configurable trapped-ion arrays for streamlined quantum processing

John Chiaverini, Los Alamos National Laboratory

(Session : Thursday from )

Abstract. One of the most promising routes to large-scale quantum information processing (QIP) is the use of ions trapped in an array, moved about via potential variation to bring various ions into proximity for quantum gates. Current use of laser radiation to bring about qubit interaction in this system leads to difficulties in scaling due to spontaneous scattering errors. Additionally, present designs for multiple, interconnected trapping zones that allow re-ordering of ions are based on inherently inconvenient multi-branch junctions, configurations which require complicated multi-pole electromagnetic field components and produce radio-frequency (RF) potential barriers near the intersections. We address these problems by means of a novel surface-electrode architecture for large-scale trapped ion arrays in which interactions are brought about using near-field RF and microwave fields, potentially eliminating the largest fundamental source of error in current implementations of ion-ion interactions. The arrays are fully configurable in situ, providing the capability for arbitrary dynamic microtrap layout and eliminating the need for junctions of any type. I will discuss applications to large-scale quantum simulations without lasers for logic operations and general QIP based on junctionless ion reconfiguration.